Tech Team · Kintek Solution

Synthetic graphite is manufactured through a series of complex processes that involve the transformation of raw materials into a highly ordered carbon structure. The process can be summarized into several key steps:

1. Raw Material Preparation: The primary raw materials used are coke and graphite, which are milled and then mixed with binder pitch to form a homogeneous mass. This mixture is crucial for the initial shaping of the graphite.

2. Shaping: The mixture is then shaped using methods such as isostatic pressing, extrusion, vibration molding, or die molding. These processes determine the initial form of the graphite, which is often referred to as "green" material.

3. Carbonization: The shaped "green" material is subjected to an oxygen-free environment where it is heated to about 1000°C. This process forms binder bridges between the solid particles, stabilizing the structure.

4. Graphitization: Following carbonization, the material undergoes graphitization, which involves heating it to roughly 3000°C. This high-temperature treatment transforms the amorphous carbon into a highly ordered 3-D graphite structure.

5. Secondary Pulverizing: After the initial shaping, the formed small carbon balls are milled again to achieve very fine grains, which are essential for the uniformity and quality of the final product.

6. Isostatic Pressing: The fine grains are then subjected to high pressure (over 150 MPa) in large molds. This process ensures that the graphite grains are symmetrically arranged and evenly distributed, leading to consistent properties throughout the graphite block.

7. Machining and Purification: Once the graphite is fully formed, it undergoes machining to meet specific customer requirements. For applications requiring high purity, such as in the semiconductor industry, the graphite is purified using chemical methods, typically involving treatment with halogen gases at high temperatures.

8. Surface Treatment and Shipment: Depending on the application, the graphite surfaces may be further treated for smoothness or other desired characteristics. After final inspection, the finished graphite products are packed and shipped to customers.

This detailed manufacturing process ensures that synthetic graphite possesses the high thermal and electrical conductivity, mechanical strength, and chemical stability required for various industrial applications, including electronics, composites, and energy technologies.

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